1# IOMMU_API always gets selected by whoever wants it.
2config IOMMU_API
3	bool
4
5menuconfig IOMMU_SUPPORT
6	bool "IOMMU Hardware Support"
7	default y
8	---help---
9	  Say Y here if you want to compile device drivers for IO Memory
10	  Management Units into the kernel. These devices usually allow to
11	  remap DMA requests and/or remap interrupts from other devices on the
12	  system.
13
14if IOMMU_SUPPORT
15
16# MSM IOMMU support
17config MSM_IOMMU
18	bool "MSM IOMMU Support"
19	depends on ARCH_MSM8X60 || ARCH_MSM8960
20	select IOMMU_API
21	help
22	  Support for the IOMMUs found on certain Qualcomm SOCs.
23	  These IOMMUs allow virtualization of the address space used by most
24	  cores within the multimedia subsystem.
25
26	  If unsure, say N here.
27
28config IOMMU_PGTABLES_L2
29	def_bool y
30	depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
31
32# AMD IOMMU support
33config AMD_IOMMU
34	bool "AMD IOMMU support"
35	select SWIOTLB
36	select PCI_MSI
37	select PCI_ATS
38	select PCI_PRI
39	select PCI_PASID
40	select IOMMU_API
41	depends on X86_64 && PCI && ACPI
42	---help---
43	  With this option you can enable support for AMD IOMMU hardware in
44	  your system. An IOMMU is a hardware component which provides
45	  remapping of DMA memory accesses from devices. With an AMD IOMMU you
46	  can isolate the the DMA memory of different devices and protect the
47	  system from misbehaving device drivers or hardware.
48
49	  You can find out if your system has an AMD IOMMU if you look into
50	  your BIOS for an option to enable it or if you have an IVRS ACPI
51	  table.
52
53config AMD_IOMMU_STATS
54	bool "Export AMD IOMMU statistics to debugfs"
55	depends on AMD_IOMMU
56	select DEBUG_FS
57	---help---
58	  This option enables code in the AMD IOMMU driver to collect various
59	  statistics about whats happening in the driver and exports that
60	  information to userspace via debugfs.
61	  If unsure, say N.
62
63config AMD_IOMMU_V2
64	tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)"
65	depends on AMD_IOMMU && PROFILING && EXPERIMENTAL
66	select MMU_NOTIFIER
67	---help---
68	  This option enables support for the AMD IOMMUv2 features of the IOMMU
69	  hardware. Select this option if you want to use devices that support
70	  the the PCI PRI and PASID interface.
71
72# Intel IOMMU support
73config DMAR_TABLE
74	bool
75
76config INTEL_IOMMU
77	bool "Support for Intel IOMMU using DMA Remapping Devices"
78	depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
79	select IOMMU_API
80	select DMAR_TABLE
81	help
82	  DMA remapping (DMAR) devices support enables independent address
83	  translations for Direct Memory Access (DMA) from devices.
84	  These DMA remapping devices are reported via ACPI tables
85	  and include PCI device scope covered by these DMA
86	  remapping devices.
87
88config INTEL_IOMMU_DEFAULT_ON
89	def_bool y
90	prompt "Enable Intel DMA Remapping Devices by default"
91	depends on INTEL_IOMMU
92	help
93	  Selecting this option will enable a DMAR device at boot time if
94	  one is found. If this option is not selected, DMAR support can
95	  be enabled by passing intel_iommu=on to the kernel.
96
97config INTEL_IOMMU_BROKEN_GFX_WA
98	bool "Workaround broken graphics drivers (going away soon)"
99	depends on INTEL_IOMMU && BROKEN && X86
100	---help---
101	  Current Graphics drivers tend to use physical address
102	  for DMA and avoid using DMA APIs. Setting this config
103	  option permits the IOMMU driver to set a unity map for
104	  all the OS-visible memory. Hence the driver can continue
105	  to use physical addresses for DMA, at least until this
106	  option is removed in the 2.6.32 kernel.
107
108config INTEL_IOMMU_FLOPPY_WA
109	def_bool y
110	depends on INTEL_IOMMU && X86
111	---help---
112	  Floppy disk drivers are known to bypass DMA API calls
113	  thereby failing to work when IOMMU is enabled. This
114	  workaround will setup a 1:1 mapping for the first
115	  16MiB to make floppy (an ISA device) work.
116
117config IRQ_REMAP
118	bool "Support for Interrupt Remapping (EXPERIMENTAL)"
119	depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
120	select DMAR_TABLE
121	---help---
122	  Supports Interrupt remapping for IO-APIC and MSI devices.
123	  To use x2apic mode in the CPU's which support x2APIC enhancements or
124	  to support platforms with CPU's having > 8 bit APIC ID, say Y.
125
126# OMAP IOMMU support
127config OMAP_IOMMU
128	bool "OMAP IOMMU Support"
129	depends on ARCH_OMAP
130	select IOMMU_API
131
132config OMAP_IOVMM
133	tristate "OMAP IO Virtual Memory Manager Support"
134	depends on OMAP_IOMMU
135
136config OMAP_IOMMU_DEBUG
137       tristate "Export OMAP IOMMU/IOVMM internals in DebugFS"
138       depends on OMAP_IOVMM && DEBUG_FS
139       help
140         Select this to see extensive information about
141         the internal state of OMAP IOMMU/IOVMM in debugfs.
142
143         Say N unless you know you need this.
144
145config TEGRA_IOMMU_GART
146	bool "Tegra GART IOMMU Support"
147	depends on ARCH_TEGRA_2x_SOC
148	select IOMMU_API
149	help
150	  Enables support for remapping discontiguous physical memory
151	  shared with the operating system into contiguous I/O virtual
152	  space through the GART (Graphics Address Relocation Table)
153	  hardware included on Tegra SoCs.
154
155config TEGRA_IOMMU_SMMU
156	bool "Tegra SMMU IOMMU Support"
157	depends on ARCH_TEGRA_3x_SOC
158	select IOMMU_API
159	help
160	  Enables support for remapping discontiguous physical memory
161	  shared with the operating system into contiguous I/O virtual
162	  space through the SMMU (System Memory Management Unit)
163	  hardware included on Tegra SoCs.
164
165endif # IOMMU_SUPPORT
166